I don’t know why I’m so upset

Posting here cause you mommas have babies the same age I do, and I dont have really anyone to vent to.

My period is a week late, and I keep getting negative tests. At the first thought that I could be pregnant i was terrified. My baby is only 7 months old. I can barely handle him as is, let alone with a baby brother/sister. But the more I thought about it, the more excited I got. The first time I got a negative, i tested at night, then the next morning. 2 and 3 days late. Now I’m 7 days late and still no line. Not even a faint one. We cant afford another baby. Ours is still so young. We we’re no where near ready to try for another one. So why am I so upset that I’m not pregnant? ☹️